CN109061473A - A kind of Wind turbines master control system grid adaptability filed detection system and method - Google Patents
A kind of Wind turbines master control system grid adaptability filed detection system and method Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
This application discloses a kind of Wind turbines master control system grid adaptability filed detection system and method, the detection system includes: the first bus, bypass, major loop, the second bus and three impedance bleeder circuits.In the application, detection system is low-voltage device, is moved easily and transports, and can carry out the test of more Wind turbines grid adaptabilities in a short time, suitable for inspecting the recruitment evaluation after blower after wind field fan improvement by random samples.
Description
Technical field
This application involves Wind turbines technical field, in particular to a kind of Wind turbines master control system grid adaptability is existing
Field detecting system and method.
Background technique
35kV movable type grid adaptability detection platform has been developed at present, which carries out repeatedly scene examination
It tests.Fig. 1 is the usage scenario of detection platform 9 in the prior art.Following problems are found in test at the scene: one, the wind inspected by random samples
Motor group tests the requirement for not being able to satisfy the grid-connected aptitude tests standard of Wind turbines for the first time, requires producer and carries out multiple component
Replacement and software change could complete test.Two, grid adaptability detection platform is by two containers (each container about 35
Ton), test requires to can be only done sampling observation to the hoisting transportation of container and the dilatory of 35kV cable and installation, short time every time
The test of one Wind turbines of wind power plant, remaining Wind turbines can only by producer's later period according to scene find the problem of into
Row rectification, but due to lacking field demonstration, the effect of rectification is difficult to assess；Three, current transformer 690V generally pacifies point of incoming cables
Equipped with filter circuit, when carrying out grid adaptability test, filter circuit will affect the output quantity of detection platform, and then influence test
As a result.
Summary of the invention
The application's is designed to provide a kind of Wind turbines master control system grid adaptability filed detection system and side
Method, to solve the problems, such as that detection platform inconvenience in the prior art is mobile and transports.
In a first aspect, a kind of Wind turbines master control system grid adaptability on-site test system provided by the embodiments of the present application
System, the detection system includes: the first bus, bypass, major loop, the second bus and three impedance bleeder circuits；
First bus is connect with Wind turbines distribution transformer；
First bus and the bypass connect, and are provided with first switch in the bypass；
First bus is also connect with the major loop, second switch is disposed on the major loop, IGBT is changed
Flow device and third switch；
The first switch and third switch are connect with second bus respectively；
Second bus is connect with three impedance bleeder circuits；
The impedance bleeder circuit includes first resistor and second resistance, the input terminal of the first resistor and described second
The input terminal of resistance is connect with the output end of second bus respectively, and main control PLC is connect by secondary line with current transformer, described
The output end of first resistor and the output end of second resistance are connect with the secondary line.
Second aspect, embodiments herein provide a kind of Wind turbines master control system grid adaptability on-site test
Method the described method comprises the following steps:
It determines impedance bleeder circuit parameter, according to impedance bleeder circuit parameter, first resistor value and second resistance value is set,
The parameter is R1/R2, and R1 is first resistor value, and R2 is second resistance value；
It will test between the access main control PLC of system and current transformer；
First switch is closed, second switch and third switch is disconnected, obtains the voltage for bypassing added voltage value and main control PLC
Sampled value judges whether bypass added voltage value and the voltage sample value of main control PLC meets the first preset ratio；
If meeting the first preset ratio, first switch is disconnected, closes second switch and third switch, modification impedance partial pressure
Circuit parameter resets first resistor value and second resistance value according to modified impedance bleeder circuit parameter；
Second switch and third switch are closed, first switch is disconnected, starts detection system, judges voltage value added by major loop
Whether meet the second preset ratio with the voltage sample value of main control PLC；
If meeting the second preset ratio, by the way that IGBT inverter parameter simulation test condition is arranged, Wind turbines are detected
Grid adaptability.
Further, it is described detection Wind turbines grid adaptability include frequency adaptability, three-phase imbalance adaptability,
Flickering adaptability and harmonic wave adaptability.
Further, the method also includes:
If meeting the second preset ratio, the voltage and current signals acquired using data collecting instrument calculate Wind turbines
The active power and reactive power of outlet transformer.
Further, the step of determining impedance bleeder circuit parameter, comprising:
According to Ui/ (R1+R2)=Uo/R2, computing impedance bleeder circuit parameter, wherein Ui 380V, Uo are current transformer
Voltage value.
Further, if described meet the first preset ratio, first switch is disconnected, second switch is closed and third is opened
It closes, modifies impedance bleeder circuit parameter according to modified impedance bleeder circuit parameter and reset first resistor value and second
The step of resistance value includes:
If meeting the first preset ratio, first switch is disconnected, closes second switch and third switch；
Measure the voltage difference U io of the input terminal of first resistor and the input terminal of second resistance, the voltage at second resistance both ends
Poor Uoo；
According to (Uio-U)/(R1+R2)=Uoo/R2, the pressure drop U of IGBT inverter is calculated；
According to pressure drop U, modifies impedance bleeder circuit parameter and reset according to modified impedance bleeder circuit parameter
First resistor value and second resistance value.
From the above technical scheme, this application provides a kind of inspections of Wind turbines master control system grid adaptability scene
Examining system and method, the detection system include: the first bus, bypass, major loop, the second bus and three impedance partial pressure electricity
Road.In the application, detection system is low-voltage device, is moved easily and transports, and can carry out more Wind turbines electricity in a short time
Net compatibility test, suitable for inspecting the recruitment evaluation after blower after wind field fan improvement by random samples.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the application
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the usage scenario of detection platform in the prior art
Fig. 2 is a kind of Wind turbines master control system grid adaptability filed detection system provided by the embodiments of the present application
Structural schematic diagram；
Fig. 3 is wiring schematic diagram when detection system provided by the embodiments of the present application uses.
It illustrates:
Wherein, 1- Wind turbines distribution transformer, the first bus of 2-, 3- bypass, 31- first switch, 4- major loop, 41-
Second switch, 42-IGBT inverter, 43- third switch, the second bus of 5-, 6- impedance bleeder circuit, 61- first resistor, 62-
Second resistance, 7- main control PLC, 8- current transformer, 9- detection platform, 10- detection system, 11- Wind turbines outlet transformer, 12-
Data collecting instrument.
Specific embodiment
In a first aspect, being illustrated referring to Fig. 2 to presently filed embodiment, a kind of Wind turbines master control system power grid
Adaptability filed detection system includes: the first bus 2, bypass 3, major loop 4, the second bus 5 and three impedance bleeder circuits 6；
Grid adaptability filed detection system in the application uses indirect AC convertor, controls device entirely based on power electronics
Part, output voltage curve are programmable.Output voltage uses closed-loop control, and voltage adjusting dynamic characteristic is good, and control precision is high, output
Voltage phase sequence, phase, amplitude and frequency Independent adjustable, voltage change and recovery curve are smooth, meet domestic Wind turbines
The test requirements document of grid adaptability.
First bus 2 is connect with Wind turbines distribution transformer 1；
First bus 2 is connect with the bypass 3, is provided with first switch 31 in the bypass 3；
First bus 2 is also connect with the major loop 4, be disposed on the major loop 4 second switch 41,
IGBT inverter 42 and third switch 43；
The first switch 31 and third switch 43 are connect with second bus 5 respectively；
Second bus 5 is connect with three impedance bleeder circuits 6；
The impedance bleeder circuit 6 include first resistor 61 and second resistance 62, the input terminal of the first resistor 61 and
The input terminal of the second resistance 62 is connect with the output end of second bus 5 respectively, and main control PLC 7 is by secondary line and becomes
It flows device 8 to connect, the output end of the first resistor 61 and the output end of second resistance 62 are connect with the secondary line.
The first bus 2 and the second bus 5 are three-phase p-wire in the application.
The 380V voltage that the application is exported using Wind turbines distribution transformer 1 is as input voltage；Input voltage passes through
The AV-DC-AC low voltage electric network adaptive testing device commutation inversion that IGBT is constituted obtains the three-phase tested for grid adaptability
Voltage；Three-phase test voltage, which is transformed to current transformer 8 by impedance bleeder circuit 6, can input the three-phase voltage signal of main control PLC 7,
Main control PLC 7 is according to secondary singal to making a response；Wind turbines are judged according to the requirement of the response condition of main control PLC 7 and standard
The grid adaptability ability of master control.
The application adds " secondary singal " in secondary side to detect the detection system of Wind turbines master control power grid adaptability.Two
It is double measurement amount that secondary side, which adds the basic principle of the detection method of " secondary singal " to be the input quantity of Wind turbines main control PLC 7,
That is the control of Wind turbines is the survey secondary for signals such as wind speed, propeller pitch angle, revolving speed, network voltage, electric currents of main control PLC 7
The response of amount amount can make master control by the different voltages disturbing signal that grid adaptability standard requirements are added in secondary side
PLC7 thinks that power grid characteristic changes, and then main control PLC 7 makes corresponding response according to control logic, is responded by these,
For example, blower whether the data that off-grid and data collecting instrument are collected, so that it may judge that Wind turbines grid adaptability ability is
The no requirement for meeting standard.
The application detection system is based on voltage source tandem principle, and back-to-back Semiconductor Converting Technology is pressed in, can run generation generation
The power trains such as Network Voltage Deviation, frequency departure, imbalance of three-phase voltage, flickering and harmonic wave required by the grid-connected directive/guide in various countries of boundary
System operational limit operating condition.Detection system working voltage 6KV/10kV, 35kV is optional, rated capacity 4MVA, detection system deviation tune
Adjusting range 0%Un-130%Un, frequency departure adjustable range 45Hz-66Hz, non-equilibrium among three phase voltages adjustable range 0.5%-
10%, total voltage percent harmonic distortion adjustable range 0.5%-10%, can be by adjusting voltage amplitude and the flexible simulating grid of phase
Variation.
In the prior art, detection device high pressure once concatenates, and using container form, volume is big, transporting and hoisting is at high cost,
In addition Wind turbines quantity is big, and the short time is difficult to carry out the recruitment evaluation after extensive field test and blower rectification；The application
The system of proposition using distribution transforming 380UV as input, using IGBT inverter 42 by voltage transformation be grid adaptability test
It uses the decompression of impedance bleeder circuit 6 for main control PLC 7 can be inputted from secondary side after waveform, and then carries out the adaptation of Wind turbines power grid
Property detection method, it is simple and effective；Detection system is low-voltage device, is moved easily and transports, and can carry out more in a short time
Wind turbines grid adaptability test, suitable for inspecting the recruitment evaluation after blower after wind field fan improvement by random samples.
Test is completed in primary equipment access in the prior art, and the capacity of testing equipment has to be larger than Wind turbines single machine appearance
Amount, capacity limit make on-site test test remain white space.The method that secondary dosage is used in the application, avoids tradition
When changing primary side 690V primary voltage test Wind turbines in test, influence of the point of incoming cables filter circuit to testing experiment；And
And secondary side test does not need to require the capacity of test platform to be greater than tested Wind turbines capacity, is equally applicable to 8-10MW
Wind turbines.
Second aspect, a kind of Wind turbines master control system grid adaptability in-situ check and test method, comprising the following steps:
Before using detection system detection grid adaptability, need to confirm to whether IGBT inverter 42 makes moist.
If following steps can be continued by not making moist.
It determines impedance bleeder circuit parameter, according to impedance bleeder circuit parameter, impedance is set in the detection system and divides electricity
Road parameter setting first resistor value and second resistance value, the parameter are R1/R2, and R1 is first resistor value, and R2 is second resistance
Value；
According to wiring schematic diagram shown in Fig. 3, will test between the access current transformer 8 of system 10 and main control PLC 7；
Specifically, stopping testing blower, stop the Wind turbines distribution transformer 1 for testing blower, disconnects Wind turbines distribution and become
The high-pressure side on-load switch of depressor 1 disconnects the secondary line between current transformer 8 and main control PLC 7, will test system 10 and accesses unsteady flow
On device 8 and the secondary line of main control PLC 7, data collecting instrument 12 is accessed.
First switch 31 is closed, second switch 41 and third switch 43 are disconnected, obtains voltage value and master control added by bypass 3
The voltage sample value of PLC7, judges whether the voltage sample value of voltage value added by bypass 3 and main control PLC 7 meets the first default ratio
Example；
The specific debugging software and data collecting instrument 12 for passing through producer, while recording added voltage value and master in bypass 3
The actual voltage sample value of PLC7 to be controlled, judges whether to meet the first preset ratio, first preset ratio is (R1+R2)/R2,
Voltage value added by the bypass 3 is the voltage difference U i i of the input terminal of first resistor and the input terminal of second resistance.
If meeting the first preset ratio, first switch is disconnected, closes second switch and third switch, modification impedance partial pressure
Circuit parameter resets first resistor value and second resistance value according to modified impedance bleeder circuit parameter.
Specifically, illustrating that there is no problem for device in bypass 3 if meeting the first preset ratio, can carrying out repairing in next step
Positive impedance bleeder circuit parameter.
Second switch and third switch are closed, first switch is disconnected, starts detection system, judges voltage value added by major loop
Whether meet the second preset ratio with the voltage sample value of main control PLC；
Second preset ratio is (R1+R2)/R2, wherein voltage value added by major loop is Wind turbines distribution transformer electricity
Pressure subtracts the voltage value that the voltage drop value of IGBT inverter obtains.
Specifically, starting detection device, output meet the test waveform of grid adaptability regulation detection, pass through the tune of producer
Software and data collecting instrument are tried, while recording added voltage value and the actual voltage sample value of main control PLC 7 on major loop 4.
If meeting the second preset ratio, by the way that IGBT inverter parameter simulation test condition is arranged, Wind turbines are detected
Grid adaptability.
IGBT inverter on major loop 4 is surveyed referring to professional standard NB/T 31054_2014 Wind turbines grid adaptability
Try parameter setting and triggering control that regulation carries out inverter.
Specifically, limited load 100kw first starts blower, it is suitable by the parameter simulation network voltage of IGBT converter Control
Ying Xing, frequency adaptability, three-phase imbalance adaptability, flickering adaptability and harmonic wave adaptability carry out test item by item, and test passes through
Load limitation is opened gradually to be tested, until load limitation is all open, after the completion of test, according to blower whether off-grid and
The data analysis result of data collecting instrument, judges whether blower meets grid adaptability requirement.
The test of Wind turbines grid adaptability is to generate electricity in Wind turbines step-up transformer high-pressure side using test device
The grid disturbances such as net voltage deviation, frequency departure, imbalance of three-phase voltage, voltage flicker and harmonic wave, so that it is tested to verify examination
The service ability of Wind turbines and a wind-electricity integration testing inspection behavior of relaying configuration.
Further, it is described detection Wind turbines grid adaptability include frequency adaptability, three-phase imbalance adaptability,
Flickering adaptability and harmonic wave adaptability.
Further, the method also includes:
If meeting the second preset ratio, the voltage and current signals acquired using data collecting instrument calculate Wind turbines
The active power and reactive power of outlet transformer 10.
Further, the step of determining impedance bleeder circuit parameter, comprising:
According to Ui/ (R1+R2)=Uo/R2, computing impedance bleeder circuit parameter, wherein Ui 380V, Uo provide for producer
Current transformer voltage value.
Further, if described meet the first preset ratio, first switch is disconnected, closes second switch and third
Switch modifies impedance bleeder circuit parameter, according to modified impedance bleeder circuit parameter, resets first resistor value and the
The step of two resistance values includes:
If meeting the first preset ratio, first switch is disconnected, closes second switch and third switch；
Measure the voltage difference U io of the input terminal of first resistor and the input terminal of second resistance, the voltage at second resistance both ends
Poor Uoo；
According to (Uio-U)/(R1+R2)=Uoo/R2, the pressure drop U of IGBT inverter is calculated.
According to pressure drop U, modifies impedance bleeder circuit parameter and reset according to modified impedance bleeder circuit parameter
First resistor value and second resistance value.
Present application contemplates the influences of 42 pressure drop of IGBT inverter, and the impedance bleeder circuit of needs is first tested using bypass 3
Parameter R1/R2 is avoided in the method for testing modified R 1/R2 using major loop 4 because 42 pressure drop of IGBT inverter influence is secondary
Input value, so as to cause fan test failure.
From the above technical scheme, this application provides a kind of inspections of Wind turbines master control system grid adaptability scene
Examining system and method, the detection system include: the first bus 2, bypass 3, major loop 4, the second bus 5 and three impedance partial pressures
Circuit 6.In the application, detection system is low-voltage device, is moved easily and transports, and can carry out more Wind turbines in a short time
Grid adaptability test, suitable for inspecting the recruitment evaluation after blower after wind field fan improvement by random samples.
Those skilled in the art will readily occur to its of the application after considering specification and practicing application disclosed herein
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the application, these modifications, purposes or
Person's adaptive change follows the general principle of the application and including the undocumented common knowledge in the art of the application
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are by following
Claim is pointed out.
It should be understood that the application is not limited to the precise structure that has been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.Scope of the present application is only limited by the accompanying claims.
Claims (6)
1. a kind of Wind turbines master control system grid adaptability filed detection system, which is characterized in that the detection system packet
It includes: the first bus (2), bypass (3), major loop (4), the second bus (5) and three impedance bleeder circuits (6)；
First bus (2) connect with Wind turbines distribution transformer (1)；
First bus (2) connect with the bypass (3), is provided with first switch (31) on the bypass (3)；
First bus (2) also connect with the major loop (4), is disposed with second switch on the major loop (4)
(41), IGBT inverter (42) and third switch (43)；
The first switch (31) and third switch (43) are connect with second bus (5) respectively；
Second bus (5) connect with three impedance bleeder circuits (6)；
The impedance bleeder circuit (6) includes first resistor (61) and second resistance (62), the input of the first resistor (61)
The input terminal of end and the second resistance (62) is connect with the output end of second bus (5) respectively, and main control PLC (7) passes through
Secondary line is connect with current transformer (8), the output end of the first resistor (61) and the output end and described two of second resistance (62)
Secondary line connection.
2. a kind of Wind turbines master control system grid adaptability in-situ check and test method, which is characterized in that the method includes with
Lower step:
It determines impedance bleeder circuit parameter, according to impedance bleeder circuit parameter, first resistor value and second resistance value is set, it is described
Parameter is R1/R2, and R1 is first resistor value, and R2 is second resistance value；
It will test between the access main control PLC of system and current transformer；
First switch is closed, second switch and third switch is disconnected, obtains the voltage sample for bypassing added voltage value and main control PLC
Value judges whether bypass added voltage value and the voltage sample value of main control PLC meets the first preset ratio；
If meeting the first preset ratio, first switch is disconnected, second switch and third switch is closed, modifies impedance bleeder circuit
Parameter resets first resistor value and second resistance value according to modified impedance bleeder circuit parameter；
Second switch and third switch are closed, first switch is disconnected, starts detection system, judges voltage value and master added by major loop
Whether the voltage sample value of control PLC meets the second preset ratio；
If meeting the second preset ratio, by the way that IGBT inverter parameter simulation test condition is arranged, the electricity of Wind turbines is detected
Net adaptability.
3. a kind of Wind turbines master control system grid adaptability in-situ check and test method according to claim 2, feature
Be, it is described detection Wind turbines grid adaptability include frequency adaptability, three-phase imbalance adaptability, flickering adaptability and
Harmonic wave adaptability.
4. a kind of Wind turbines master control system grid adaptability in-situ check and test method according to claim 2, feature
It is, the method also includes:
If meeting the second preset ratio, the voltage and current signals acquired using data collecting instrument calculate Wind turbines outlet
The active power and reactive power of transformer.
5. a kind of Wind turbines master control system grid adaptability in-situ check and test method according to claim 2, feature
It is, the step of the determining impedance bleeder circuit parameter, comprising:
According to Ui/ (R1+R2)=Uo/R2, computing impedance bleeder circuit parameter, wherein Ui 380V, Uo are the voltage of current transformer
Value.
6. a kind of Wind turbines master control system grid adaptability in-situ check and test method according to claim 2, feature
It is, if described meet the first preset ratio, disconnects first switch, closes second switch and third switch, modification impedance point
Volt circuit parameter, according to modified impedance bleeder circuit parameter, the step of resetting first resistor value and second resistance value
Include:
If meeting the first preset ratio, first switch is disconnected, closes second switch and third switch；
Measure the voltage difference U io of the input terminal of first resistor and the input terminal of second resistance, the voltage difference at second resistance both ends
Uoo；
According to (Uio-U)/(R1+R2)=Uoo/R2, the pressure drop U of IGBT inverter is calculated；
According to pressure drop U, impedance bleeder circuit parameter is modified according to modified impedance bleeder circuit parameter and resets first
Resistance value and second resistance value.
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| CN111555306A (en) * | 2020-04-29 | 2020-08-18 | 云南电网有限责任公司电力科学研究院 | System and method for wind turbine generator set to participate in rapid frequency modulation of regional power grid |
| CN111555306B (en) * | 2020-04-29 | 2023-09-01 | 云南电网有限责任公司电力科学研究院 | System and method for participating in regional power grid rapid frequency modulation of wind turbine generator system |
| CN114113870A (en) * | 2022-01-28 | 2022-03-01 | 西安德纳检验检测有限公司 | New energy station power grid adaptability detection method, device and system |
| CN114113870B (en) * | 2022-01-28 | 2022-04-26 | 西安德纳检验检测有限公司 | New energy station power grid adaptability detection method, device and system |
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